Marine Botany

Question 1

What are red algae called (write it down and check spelling too)

Answer 1

Rhodophyceae

Question 2

what is a key characteristic of red algae and how are they formed

Answer 2

pit connections

• formed by incomplete cytokinesis, leaving a narrow connection filled by a “pit plug”
• their function is unknown

Question 3

describe the process of rhodophyceae reproduction

Question 3

what is the structure of red algae pigments

Answer 3

it is in the structure of a phycobilisome, which has 3 main pigments:
- phycoerythrin (chain of blocks)
- phycocyanin (first block)
- allophycocyanin (circles)

Question 3

how many genera and species are there in the rhodophyceae

Answer 3

500 genera with 5000 species

Question 4

how do rhodophyceae start new lineages

Answer 4

through endosymbiosis
- one organism living inside another (one engulfing another to create more complex organisms)

Question 5

what is the cell type of rhodophyceae

Answer 5

it is eukaryotic and can be unicellular or multicellular

Question 6

what are 3 common types of rhodophyceae

Answer 6

• Corallina officinalis (most common red in aus)
• Amphiroa spp. (calcium carbonate tips)
• porphyra spp. (nori)

Question 7

how many genera and species are there in phaeophyta

Answer 7

250 genera with over 2000 species

Question 8

where are phaeophyta found

Answer 8

• coastally (not deep waters)
• forming large kelp forests where they can grow >80m tall

Question 9

describe the reproduction of the phaeophyceae

Question 10

are algae plants - what are they

Question 11

describe the morphology of the phaeophyceae

Question 12

what is the main order of phaeophyceae

Question 13

what are 4 threats to conservation of kelp forests

Question 13

what are 3 important types of brown algae

Question 14

what is the ecological and economical importance of phaeophyceae

Question 14

what are the major anthropogenic threats to seagrass

Question 15

there are 260000 species of terrestrial plants, why only 60 species of seagrass?

Question 16

why is seagrass important to the ecosystem

Question 18

what features are used to identify types of seagrass